London Whistleblower Law Firm

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Constantine Cannon | London

whistleblower-attorneys-london 90 Bartholomew Close
London EC1A 7BN
T: +44 (0) 20 3959 0700
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Blow the Whistle

Constantine Cannon’s London whistleblower attorneys have extensive experience representing international clients from all over the world. We understand that you may feel uncertain about the prospect of reporting fraud or misconduct under the U.S. whistleblower reward programs. Our London team works to ensure your interests are protected and your concerns are investigated.

Our attorneys have acted as lead counsel to recover over $1 billion for federal and state governments and over $450 million in whistleblower rewards for our clients. In 2020, we finalized four blockbuster settlements and secured some of the highest whistleblower rewards in the history of the False Claims Act.  In 2021, we had another banner year with historic whistleblower successes.  This is in addition to the more than $5 billion in damages and tens of billions of dollars more in injunctive relief Constantine Cannon has recovered for the firm’s other clients, including two of the top five antitrust settlements in U.S. history.

Bringing Claims Under U.S. Whistleblower Laws

You do not need to be a citizen or resident of the United States to become a whistleblower. Foreign nationals who have information about fraudulent activity that is covered by U.S. whistleblower programs can bring claims under U.S. whistleblower laws and potentially receive rewards. Numerous non-U.S. citizens have received whistleblower awards under the False Claims Act, the SEC Whistleblower Reward Program, the CFTC Whistleblower Reward Program, and others. In many cases, whistleblowers located outside of the U.S. are best positioned to uncover fraudulent schemes that violate U.S. laws.

Similarly, the companies involved in fraudulent activities do not have to be based in the United States and the fraudulent scheme or activity does not need to have occurred in the United States.


More than ever before, international whistleblowers are playing an important role in the enforcement of U.S. securities laws and regulations. In particular, the SEC continues to actively pursue companies and individuals who engage in conduct that violates the Foreign Corrupt Practices Act (FCPA). Under the FCPA, it is illegal for U.S. companies, foreign companies subject to U.S. regulation, or individuals to bribe foreign officials to gain a competitive advantage. FCPA violations have resulted in some of the SEC’s largest financial recoveries in recent years. In many instances these recoveries have led to substantial whistleblower rewards.

False Claims ACT

Under the Federal False Claims Act (FCA), whistleblowers can bring a private lawsuits when the U.S. government has been defrauded. These types of “qui tam” cases allow whistleblowers, also known as relators, to share in the government’s recovery. FCA cases are one of the most powerful tools the U.S. government has for fighting corruption and fraud. And they do not have to be brought by U.S. citizens.

The FCA, and its similar state equivalents, provide that successful whistleblowers are entitled to a monetary award for helping the government recover damages. This amount can be as high as 30 percent of the government’s recovery. There are also anti-retaliation provisions in federal and state FCA statutes that allow whistleblowers to pursue certain remedies if they were fired or experienced unfair treatment in connection with being a whistleblower.

IRS Whistleblower Program

You do not need to be a U.S. citizen to receive an award under the IRS Whistleblower Program. To be eligible for an award, whistleblowers must provide specific and credible evidence that a taxpayer is avoiding or underpaying a tax obligation to the United States government, whether fraudulently or otherwise, and that information must substantially contribute to the government’s recovery of at least $2 million, including interest and penalties. The IRS Whistleblower Program guarantees to the whistleblower at least 15%, and up to 30%, of government tax collections that result from the whistleblower’s reporting to the IRS, to the extent those recoveries exceed $2 million.

Discuss Your Matter with a London Whistleblower Lawyer

Cases brought under U.S. whistleblower programs can be extremely complex, especially when factoring in an international element. It is completely understandable for prospective whistleblowers to be unsure where to even begin. That is why it is crucial to speak with a skilled, knowledgeable whistleblower attorney who can help guide you through the process. Our lawyers, who have decades of combined experience representing whistleblowers, are here to help you explore your legal options.

If you would like to discuss a potential case, please contact Constantine Cannon, LLP to schedule a consultation.


Learn about Whistleblower Rewards Programs